资源名称：Learn Javaｓｃｒｉｐｔ and Ajax with w3Schools 英文pdf

What Javaｓｃｒｉｐｔ is and isn’t 

How to put Javaｓｃｒｉｐｔ into an HTML page 

Javaｓｃｒｉｐｔ special characters and guidelines 

How to use Javaｓｃｒｉｐｔ operators 

If… else statements and do… while loops 

All about Javaｓｃｒｉｐｔ objects 

How to use Ajax properties 

What the Ajax XMLHttpRequest Object does

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